Traction Off Indicator Always On (W/NW9)

Traction Off Indicator Always On (W/NW9)

Test 1-8:

Circuit Description
The Traction Off indicator is controlled by the instrument panel cluster (IPC) via serial data messages from the electronic brake control module (EBCM). When the heater and air conditioning (A/C) control (W/C67) or the instrument panel module (IPM) (W/CJ2) sees the traction control switch input grounded through the momentary traction control switch, it sends a serial data message to the EBCM that tells the EBCM that the traction control switch has been pressed. The EBCM then disables traction control and sends a message to the IPC to turn the Traction Off indicator ON. Each time the ignition is cycled from OFF to ON, the traction control system (TCS) is enabled,

The following conditions will cause the Traction Off indicator to illuminate:
^ The EBCM has disabled the TCS due to a DTC.
^ The driver manually disabling the TCS via the traction control switch.
^ The IPC bulb check. When the ignition switch is turned to ON, the Traction Off indicator will turn ON for approximately 3 seconds and then turn OFF.

Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. Use the scan tool to check the normal state of the Traction Off indicator control.
3. Ensures that the instrument cluster can operate the Traction Off indicator.